Lock



A. POLLAK March 18, 1930.

LOCK

Filed July 10, 1928 2 Sheets-Sheet i M flN H m m E 0 W n PQW N A. POLLAK March 18, 1930.

LOCK

Filed July 10, 1928' 2 Sheets-Sheet 2 IN VEN TOR. AW /N POLLAI/f A TTORNEY. I

gi r d wf 1 a I I Patented Mar. 18, 19 30 P r; l

A R'MIN POLLAK, F BRONX, NEW YORK LOCK This invention relates to improvements in looks and has particular reference to a lock of the permutation type.

An object ofthe invention is to provide a *highly efHcient lock of improved construction embodying features of simplicity and. practicability and wherein the locking bolt is effectively maintained, in its locked position, against tamperingv by unauthorized persons Another object is to provide av separable casing for the lock in which theparts' thereof areeif'ectivel-y held together in an improved manner while the locking bolt is in operativ'e position,.-thereby to prevent access to the interior mechanism of the lock.

Another object resides-in providing a series of tumblers operable to release a locking mechanism to permit of the retraction of the locking bolt fromitsoperative position and to interpose between andengage with said tumblers and bolt an additional locking element eifective, by its. engagement with. said tumblers whenthelatter are in certain positiolns, to prevent movementof said locking bo t.

The. aboveand other objects will appear more clearly in the following detailed description-when taken in connection with the accompanying, drawings which illustrate a preferred embodiment ofthe inventive idea.

Inthe drawings I Figurewl is a fragmentary side elevation, partly broken away and'shownin section, of the steering' wheel of a motor. vehicle showing. the applicationiofv the invention thereto.

Figure 2 is an enlarged fragmentary elevation, partly broken away and shown in section, of the steeringfcolumn illustrating the mannerv in which the. lock is attached thereto.

F igureB is a plan view of. the interior of the lock casing, Wlth'PBItS in section,villustrating. the operative position of the locking bolt, the dotted lines indicating parts-of the mechanism carried by the cover of thecasing.

Figure 4 is an interior plan view of the cover of the casing andparts of the locking mechanism carried thereby.

Figure is'a longitudinal section through the lock casing.

7 tion as set forth in the appended claims.

Application filed July 10, 1928. Serial- No; 291,579.

Figure 6 is a fragmentary plan view similar to Figure 3 but showing the locking bolt in its retracted or inoperative position.-.

Figure 7 is a side elevation of one of the tumblers forming, a part of the permutation lock mechanism; and v r v Figure 8- is an end elevation of the tumbler with its spindle shown in section.

Althoughthe lock is shown and described in its application to the steering wheelof an automobile, it will be expressly understood that the construction illustrated herein is applicableto other types of locks without de parting from the spirit or'sc'ope ofthe inven- In Figure it there is shown the usual steering' wheel 10 having the spokes 11 with the hub. ofthe wheel keyed in the usual manner to the steering shaft through column I3.v

The lock of the present invention comprises a casing. 14: of rectangular formation and provided with; a. removable cover-15, the casing and cover combining tosupport and enclose the locking mechanism. v

The casingll carries asectional attaching sleeve 16 to be securedto the column 13 in themanner best illustrated in Figure 2. The two semicircular sections of the attaching sleeve-are held together by means of screw 12 which j extends bolts. l'Tj'of a special type, which, however,

do not form a partof the present invention.

These screw bolts are so'made thatwhen the same are threaded into their openings and ti htened the heads thereof, indicated in dotted lines, will be, sheared from the main portion of therbolt by the torsional twist imparted'theretor With the head of the bolt 7 thus detached the outer end of the shank is counter-sunk in a. portion of the sleeve 16 and thus. prevents the bolt from being withdrawn and the sleeve detached from the steer ing, column. Oneor more'bolts 18 similar to the bolt 1i? may alsobe threaded into the sleeve 16 with'the inner'ends of said bolts projecting. through openings in the column 13,. whereby turning of the sleeve relative to the column is'prevented.

With the lock casing supportedin themanner described directly below the steering v 3 wheel, the locking bolt 19, which is longitudinally slidable in the casing 14, mayhave its bifurcated locking end projected from the upper end of the casing so as'to receive one 'of' the spokes -11 of the steering wheel between the portions of saidend 20 and thereby prevent rotation of said wheel in'either di- 'rection. jVhenthe bolt 19 is locked inthis position it "is desirable that means beprovided for preventing surreptitious removal 7 of the cover 15 of the casing which is only- 'held in its covering positio'n by means of screw bolts 21 (Fig.3) extending through the cover and bottom of the casing and en- .gaging'in a plate 22 carried by the attaching sleeve; 1.6. To avoid the detachment of the cover 15,- when the locking bolt 19 'is'in its operative position, the screw, bolts 21 are provided intermediate their Y ends p with squared portions aaan side of each ofwhich f'is adapted to engage the adjacent longitudi V Y nal edgeofthe locking'bolt whereby a turning movement of the bolt 21 is absolutely prevented. However, said bolts may be re- 1 sitio'n as shown in Figure 6, by the provision moved-when the bolt 19-is in its retracted po in said edge .of thebolt 19 of'small recesses 24," each of which aligns with onelof, the squared portions23 to afford space for turning movement ofthe'bolt 21. I I

' "The permutation locking mechanism" 'com- I I prises series oftumblers 25', there being three shown in the present instance and these tumblers are carried by the cover 15 with the spindles 26 thereofprojecting from theouter side of the cover so thatsaid-tumblers may be rotated in accordance with the particular combination necessary to unlock the mechavnism, The tumblers, as shown in full lines.

inFigure' l and dotted lines in Figure 3', are

7 in position to permit ofzthe retraction of the lockingbolt 19 but when said tumblers are turned the peripheries of't'he heads26 thereof will each 'be engaged by an'adjacent lug 27 projecting-laterally from a locking bar28, which isinterposedbetween said tumblers andthe locking bolt Springs 29 areen gaged with the'locking bar 28 to urge the sametoward said locking bolt, whereby the lugs30 ofthelatter-are each engaged with an inclined surface .31 of the bar/28 and the shoulder 'formed by'said surface at one end thereof." The 'bar28 is mounted in guides 32 for-sliding movementlaterally of the casing and'to'ward' and away from'the bolt '19, after the-tumblers have been set to-the dotted line position shownin; Figure 3. The lower end of the locking bo1tf19 which projects through I the low'erend of the casing may now be ing the lugs 30 on said bolt will slide along grasped'and pulled downwardly. In so d0- 7 theinclinedsurfaces 31 andmove1the bar 28 away from'said bolt, the lugs27 on said bar then entering the notches '33 formed in the of respective tumblers.

l he

other hand, when thetum'blers 25 are turned so that the notches 33, or any one of them, are not aligned with the lugs 27 the latter will, as previouslv referred to, engage the peripheries of the heads 26 and thus'prevent any lateral movement of the bar'28, with the resuit that the bolt 19 cannot be pulledidownwardly' due to thewedging action of the lugs 30 against the inclined surfaces 31. 4'

An additional locking means for the bolt 19 .is'provided, alsocontrolled'b'y the setting 3 of the tumblers 25. This means consists of a plurality of locking pins or stops 34, 'slidably carried by the cover'15 and adapted to be recessed within a block 35 on said cover when the tumblers 25 are set in accordance with the proper combination. When in projected position, the pins 34 engage'behind a shoulder 36 of the bolt 19, as indicated in dotted lines 3 V in F igure' 3, thus affording an additional 8 means for preventing retraction of said bolt;

In order to retract the pins 34 from their locking positions each tumbler 25,1'which utilized to'control one of 'thepins 34, hasfthe V; V

inner surface of its head convoluted to pro-- vide a number of notches 36 of the same depth 7 and one notch 37 which is greater in depth'[ than the first named notches. The: notches f of each tumbler are engaged byjone end of a: locking pin-actuatedlever "38, said end being yieldably held in engagem'ent'jwith" the notches by a leaf spring "39 carried by thecover 15; The other end ofthelever 38 isen gaged in a similar manner withtheassoci ated locking p111 34'and 1s deslgned to project and retract 'saidapin from-and into the) 7 block 35 as the tumbler 25 is rotated. As

long'as thehfiist named end of the 1ever38 f engages in one of the shallow notches 36 ofthe tumbler the locking pin 34 will be inits' projected position and hence behind the; shoulder 36 of the bolt 19. However, when said end I of *the lever engages in the deep 7 notch 37, themovement of the lever issufl'i-r- .cient under the influence 'of'the springi39 tof completelyre'tract: the pin 34 into the block,

35 and thusmove it outof 1th'e' path of the V 34, notches 33-013 said tumblersare aligned withzftheir respective lugs 27, asipreviously" described, and the boltl-1 9 may be moved to its inoperative position; "The purpose of forming the heads of thetumblers 26 with the series of notches'36, rather than having simply a'smooth cam surface, is to make it" more diflicult 1 for an unauthorized person,

wvhen turning the spindles 26, 130 feel the" movement of the end o fithe lever 38 into the deep notch 37.

It will be understood that tumbler 25 is arrangedon its spindle in accordancewith a particular'numberofnthe known combination so'that a person knowing thiscombination may turn the spindle so as to bring the deep notch 37 into registration with the end of the associated lever 38. The tumbler is preferably keyed upon the spindle as shown at in Figure 8 so as to turn with said spindle, the locking key being inserted after the tumbler has been rotated relative to the spindle to properly position it in accordance with one number of the combination. To change the combination, it is only necessary to withdraw the locking key and readjust the tumbler about the spindle to a known position.

The person unlocking the lock is enabled to better know the number ofnotches 36 which are moved past the end of the lever 38, by providing the body of the tumbler with teeth 41 eXtending about its periphery and engaged by a spring pawl 42, there being one tooth for each of the notches 37. As the tumbler is rotated and each tooth 41 is moved past the free end of its associated pawl the latter will cause a sound to be made which can be heard by the person manipulating the lock. 7

After the bolt 19 has been unlocked and withdrawn to its inoperative position it may again be moved to locking position by pushing the same upwardly and then turning the tumblers 25 so that the heads 26 thereof will again engage the lugs 27 of the bar 28 and the locking pins 34 again projected into the path of the shoulder 3 What is claimed is 1. In a look, a sliding lock bolt, a locking mechanism therefor, including a plurality of rotatable tumblers, a locking bar interposed between and engaged with said bolt and tumblers to retain said bolt in looking position, said bar being movable to release said bolt only when said tumblers are rotated to predetermined positions, and a plurality of looking pins also controlled by said tumblers for movement into and out ofthe path of said bolt.

2. In a look, a sliding lock bolt, a locking mechanism therefor, including a plurality of rotatable tumblers having notches therein, a locking bar engaging said bolt and having lugs contacting with said tumblers to retain said bolt in looking position, said lugs being movable into said notches to permit release of said bolt only hen said tumblers are rotated to predetermined positions, and a plu rality of locking pins also controlled by said tumblers for movement into and out of the path of said bolt.

3. In a look, a sliding bolt, a locking mechanism therefor including a tumbler having a plurality of notches therein one of which is greater in depth than the others, a lever'engageable in said notches, and a locking element movable from the path of said sliding bolt when said lever engages in said deeper notch.

4. In a look, a sliding bolt, a locking mechanism therefor, including a tumbler having a sinuous surface formmg a plurality of notches, one of which is greater in depth than the others, a lever engageable in said notches, and a locking element movable from the path of said sliding bolt when said lever engages in said deeper notch.

5. In a look, a sliding bolt, a plurality of tumblers each having notches therein with a notch in each tumbler greater in depth than the remainder, a locking member engaged by said bolt andtumblers and movable relative to the same, when the tumblers are set to predetermined positions, to release said bolt, a lever associated with each of saidtumb-lers and engageable in the notches thereof, and a locking pin for eachlever movable out of the path of said sliding bolt when said lever engages in the deeper notch of its associated tumbler.

ARMIN POLLAK. 

